<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <script>
   const person=[{
     name:'张三',
     salary:10000
   },{
    name:'李四',
    salary:10000
   },{
    name:'王五',
    salary:10000
   }]
    person.reduce((prev,item)=>{
      console.log(prev);
       return prev+item.salary*1.2
    },0)
  </script>
</body>
</html>